Research on clinical samples (i.e., people referred for diagnosis or treatment) has suggested that children who experience the death of a parent may be at risk for developing depression or anxiety in...

Research on clinical samples (i.e., people referred for diagnosis or treatment) has suggested that children who experience the death of a parent may be at risk for developing depression or anxiety in adulthood. Mireault (1990) collected data on 140 college students who had experienced the death of a parent, 182 students from two-parent families, and 59 students from divorced families. The data are found in the file Mireault.dat and are described in Appendix: Computer Exercises.

a. Use any statistical program to run t tests to compare the first two groups on the Depression, Anxiety, and Global Symptom Index t scores from the Brief Symptom Inventory (Derogatis, 1983).

b. Are these three t tests independent of one another? (Hint: To do this problem you will have to ignore or delete those cases in Group 3 [the Divorced group]. Your instructor or the appropriate manual will explain how to do this for the particular software that you are using.)